So, you need seo definitions ?

SEO Glossary and SEO Definitions

H

HTTP – Stands for “Hypertext Transfer Protocol.”

HTTPS – Stands for “Hypertext Transfer Protocol Secure.”

HTTP Referrer Data – A program included in most web analytics packages that analyzes and reports the source of traffic to the user’s web site. The HTTP referrer allows webmasters, site owners and PPC advertisers to uncover new audiences or sites to target or to calculate conversions and ROI for future ad campaigns.

Head Terms – Search terms that are short, popular and straightforward; e.g., "helicopter skiing." These short terms are called "head terms" based on a bell-curve distribution of keyword usage that displays the high numbers of most-used terms at the “head” end of the bell curve graph. See also Tail Terms.

Hidden text -- (Also known as Invisible text.) Text that is visible to the search engines but hidden to a user. It is traditionally accomplished by coloring a block of HTML text the same color as the background color of the page. More creative methods have also been employed to create the same effect while making it more difficult for the search engines to detect or filter it. It is primarily used for the purpose of including extra keywords in the page without distorting the aesthetics of the page. Most search engines penalize or ignore URLs from web sites that use this practice.

Hit – The request or retrieval of any item located within a web page. For example, if a user enters a web page with 5 pictures on it, it would be counted as 6 “hits.” One hit is counted for the web page itself, and another 5 hits count for the pictures.